Burner



FIG. 1 is a perspective view of a burner;

FIG. 2 is a front side view thereof;

FIG. 3 is a back side view thereof;

FIG. 4 is a top side view thereof;

FIG. 5 is a bottom side view thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is a right side view thereof.

The broken lines shown in the drawings illustrate environmental subject matter and form no part of the claimed design. 

CLAIM The ornamental design for a burner, as shown and described. 